Spatio-Temporal Variation of an Aquifer Salinity in a Semi-Arid Area, Case Study of Sarvestan Plain, Iran

Document Type : Original Research Paper

Authors

1 Environmental Engineering, Water resources, Kish International Campus, University of Tehran, Kish Island, Iran

2 School of Environment, College of Engineering, University of Tehran, P.O.Box 14155-6135, Tehran, Iran

Abstract

The aim of this study is to determine the amount of quantitative and qualitative changes in groundwater in the Sarvestan plain in south of Fars province, which is one of the critical plains in Iran in terms of water resources. In this research, zoning maps of electrical conductivity of water in GIS were prepared and various hydrochemical diagrams were illustrated. Different quality parameters of water resources were compared according to the statistical data collected and the experiments performed at the beginning of the 8-year period of the research. Chemical analysis of water samples shows that the groundwater type of most of the studied wells at the beginning of the period (2013) has changed from Ca-Cl and Mg-Cl types to Na-Cl type at end of the time period (2020). Determining the trend of chemical changes shows that the diversity of water samples in terms of anions and cations in water with increasing salinity at the end of the period is less than the variety of samples at the beginning of the period. According to the results of chemical experiments, evaporation, crystallization, and weathering of rocks are the factors that control the composition of groundwater in the study area. This study shows increasing the salinity of groundwater in addition to decreasing precipitation and high water use for agricultural application, due to the type of geological formations, especially the presence of salt domes at groundwater inlets to the plain on the east side of the study area.

Keywords

References

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Pollution
Volume 8, Issue 1
January 2022
Pages 147-157

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